Answer:
9b² + 3b - 6
Explanation:
(3b + 3)(3b - 2)
each term in the second factor is multiplied by each term in the first factor, that is
3b(3b - 2) + 3(3b - 2) ← distribute parenthesis
= 9b² - 6b + 9b - 6 ← collect like terms
= 9b² + 3b - 6 ← in standard form